DBMS > Dolt vs. Drizzle vs. Hawkular Metrics
System Properties Comparison Dolt vs. Drizzle vs. Hawkular Metrics
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|Editorial information provided by DB-Engines|
|Name||Dolt Xexclude from comparison||Drizzle Xexclude from comparison||Hawkular Metrics Xexclude from comparison|
|Drizzle has published its last release in September 2012. The open-source project is discontinued and Drizzle is excluded from the DB-Engines ranking.|
|Description||A MySQL compatible DBMS with Git-like versioning of data and schema||MySQL fork with a pluggable micro-kernel and with an emphasis of performance over compatibility.||Hawkular metrics is the metric storage of the Red Hat sponsored Hawkular monitoring system. It is based on Cassandra.|
|Primary database model||Relational DBMS||Relational DBMS||Time Series DBMS|
|Secondary database models||Document store|
|Developer||DoltHub Inc||Drizzle project, originally started by Brian Aker||Community supported by Red Hat|
|Current release||7.2.4, September 2012|
|License Commercial or Open Source||Open Source Apache Version 2.0||Open Source GNU GPL||Open Source Apache 2.0|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||Linux|
|Typing predefined data types such as float or date||yes||yes||yes|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||no|
|SQL Support of SQL||yes||yes with proprietary extensions||no|
|APIs and other access methods||CLI Client|
|Supported programming languages||Ada|
|Server-side scripts Stored procedures||yes currently in alpha release||no||no|
|Triggers||yes||no hooks for callbacks inside the server can be used.||yes via Hawkular Alerting|
|Partitioning methods Methods for storing different data on different nodes||none||Sharding||Sharding based on Cassandra|
|Replication methods Methods for redundantly storing data on multiple nodes||A database can be cloned to multiple locations and be used there in isolation. Data/schema changes can be pushed/pulled explicitly between locations.||Multi-source replication|
|selectable replication factor based on Cassandra|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency based on Cassandra|
Immediate Consistency based on Cassandra
|Foreign keys Referential integrity||yes||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||no|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no|
|User concepts Access control||Only one user is configurable, and must be specified in the config file at startup||Pluggable authentication mechanisms e.g. LDAP, HTTP||no|
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